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AJNR - American Journal of Neuroradiology

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MR Imaging After Aneurysmal Subarachnoid Hemorrhage and Surgery: A Long-term Follow-up Study

Riku P. Kivisaari^a, Oili Salonen^a, Antti Servo^a, Taina Autti^a, Juha Hernesniemi^a and Juha Öhman^a

^a From the Departments of Neurosurgery (R.P.K., J.H., J.Ö.) and Diagnostic Radiology (O.S., A.S., T.A.), Helsinki University Central Hospital, Helsinki, Finland.

View larger version (84K): [in a new window]   FIG 1. T2-weighted image shows lesion caused by surgery in the base of the right frontal lobe.FIG 2. Images show large infarction caused by arterial vasospasm in the right temporal lobe. A, T1-weighted image. B, T2-weighted image.

View larger version (99K): [in a new window]   FIG 3. T2-weighted image shows small high signal foci in left centrum semiovale.FIG 4. Fluid-attenuated inversion recovery image shows severe leukoaraiosis with increased periventricular signal intensity, numerous high signal foci, and a small infarction in the right centrum semiovale

View larger version (21K): [in a new window]   FIG 5. Ratio of signal intensities between the sides of initial bleeding and the contralateral sides in various regions of interest in 18 patients with ruptured aneurysms of the middle cerebral artery